Circular-saw holder



(No Model.)

J. SLATER.

CIRCULAR SAW HOLDER.

No. 381,651. 7 Patented Apr. 24, 1888. j' i i WITNESS INVENTORATTORNEYS.

N. PETERS. Phu'o-Ulhognphzn wuhm mn a. c.

which the machine is located.

Unrrsn STATES PATENT Orrrcat J OHN SLATER, OF PARTHENIA, PENNSYLVANIA.

CIRCULAR-SAW HOLDER.

SPECIFICATION forming part of Letters Patent No. 381,651, dated April24,1888.

Application filed December '1, 1887. Serial No. 257,190. (No model.)

To aZZ whom it may concern:

Be it known that I, Jenn SLATER, of Farthenia, inthe county of Warrenand State of Pennsylvania, have invented a new and Improyed OircularfiawHolder, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved device forholding circular saws firmly in position while ham mcring,gumnnng,swaging, or filing the same.

The invention consists of a shaft carrying the circular saw to beoperated upon and mounted to turn in a vertically and longitudinallyadjustable frame.

The invention also'consists of certain parts and details and combinationof the same, as will be fully described hereinafter, and then pointedout in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a side elevation of my improvement with parts in section,and Fig. 2 is ascotional plan view of the same on the line a: m of Fig.l.

The main frame A is mounted to turn on the two spindles B B, of whichthe spindle B has its bearing in a suitable base, and the other spindle,B, has its bearing in a crossbeam of the frame O or in the ceiling ofthe room in The frame A is provided on its base D with alongitudinallyextending guideway, E, and on the under side of its topplate, I), is formed a similar guideway, E. On the guidcways E and E ismounted to slide longitudinally a post, F, into which screw thescrew-rods G, mounted to turn in suitable hearings in the frame A andprovided at their outer ends with crank-arms H for turning the saidscrewrods G, so as to move the post F longitudinally on the guideways Eand E.

On the post F is held to slide vertically a frame, I, on which ismounted transversely a shaft,J,carrying on oneendacranl -arm,K,andprovided with a gear-wheel, L, meshing into a rack, N, securedvertically to one side of the post F. On the shaft J is aiso secured aratchet-wheel, O, engaged by a pawl, P, fulcru med on the frame 1 andserving to lock the said shaft J in any desired position. hen

the said pawl P is disengaged from the ratchet-wheel O and the operatorturns the crank-arm K, the gear-wheel L, meshing into the rack N,causes-an up or down sliding motion of the frame I.

On the frame I is mounted horizontally the shaft Q, adapted to turn insuitable bearings and projecting a suitable distance from the in nor endof the frame I, being formed at this projecting end into a fork, andcarrying on the forked end an arbor, It, on which is held a circularsaw, S, to be operated on. The arbor R can be easily removed from theforked end of the shaft Q for changing the circular saws.

In the rear of and above the circular saw S is mounted in suitablebearings a shaft, '1, provided with a drivingpulley, T, connected by abelt with machinery for imparting a rotary motion to the said shaft T.On the latter is also secured a pulley, T", over which passes an endlessbelt, '1, also passing over a pulley, T secured to the shaft U, mountedto rotate in the front end of a swinging frame, U, fulcrumed on the saidshaft T. The swinging frame U is supported at its front end by a rope, Uconnected with a spring, U, which holds the said frame in its uppermostposition, and at the same time permits of swinging the frame downward. Agrinding-wheel,V, is secured on the shaft U, said wheel V beingpreferably of emery. This wheel is used to sharpen the teeth of the saw8, held directly below the said emery-wheel in a convenient position.

To the right of the saw S is held a vise, W, provided with a fixed jaw,\V, on which is hinged the swinging jaw Vi. Between the two jaws and W"can be clamped the circular saw S, as shown in Fig. 1, for swaging orfiling purposes. The two jaws W and l are held in a closed position by aU-shaped clipfllfflhinged at one end on a staple secured to the rearside of the fixed jaw VI and carry ing on its other end a set-screw,VF", adapted to engage the front of the hinged jaw W, as shown in Fig.1.

In front of the device is placed an anvil of any approved constructionand serving for hammering the saw in order to strengthen it or toincrease its diameter The operation is as follows: The circular saw S isfastened with its central aperture on the arbor R, held in the forkedend of the shaft Q. If the saw is to be ground or sharpened by thegrinding-wheel V, the shaft Q, with the saw S in the position shown inFig. 1, is turned one'half of a revolution, so that the teeth of the sawstand in an opposite direction from the one shown in Fig. 1. Thegrinding-wheel V is rotated by rotating the shaft T,so that the motionof the latter is transmitted to the shaft U by the pulleys T and T andthe belt T The operator takes hold of the front end of the swingingframe U and presses the same downward until the grinding-wheel V engagesone of the teeth of the saw, and, according to the pressure given to theframe U, said grinding-wheel V cuts more or less from the edge of thesaw. As soon as the operator releases his pressure on the swinging frameU, the latter moves upward by the action of the spring U,and thegrinding-wheel V moves out of contact with the teeth of the saw S. Thelatter is then turned the distance of one tooth, and the swinging frameU is again depressed, as above described, so that the grinding-wheel Voperates on the next following tooth. The frameI is adjustablelongitudinally and vertically in such a position that the grinding-wheelV engages the edge of the tooth whenever the frame U is slightlydepressed. This adjustment is accomplished by turning the crank-arms Hso that the screwrods G are rotated and the post F is movedlongitudinally on the guideways E, carrying with it the frame I, so thatthe axis of the circular saw S assumes a relative position to thegrinding-wheel V according to the shape of the tooth of the circularsaw. The vertical adjustment of the frame I is accomplished by turningthe crank-arm K so that the shaft J is rotated, and the gear-wheelL,meshing into the rack N on the post F, causes the frame I to move upand down until the top tooth of the circular saw S is a short distancebelow the lower edge of the grinding-wheel V. The shaft J is then lookedin position by the pawl P,thrown in contact with the ratchet-wheel 0.When the operator desires to file or swage the circular saw S, he placesthe latter in the position shown in Fig. 1 and opens the hinged jaw VVso as to permit the saw to be placed against the fixed jaw WV. Thehinged jaw W is then swung upward and against the out side of thecircular saw S, which is then clamped in position in thevise W byadjusting the clip W by means of. the set-screw W. When the saw isto behammered for the purposes above described, the main frame A is turned onits spindles B and B and the shaft Q is turned a half-revolution, sothat the circular saw S assumes a horizontal position. The frame I isthen raised or lowered until the circular saw is level with the top ofthe anvil X. The operator is now enabled to place any part of thecircular saw S on the anvil'X and operate on top of the circular saw inthe usual manner for strengthening or lengthening the saw. Thus it willbe seen that the circular saw S can be quickly placed in position forbeing operated on by a grinding-wheel, V, or be clamped in a vise, W,for filing or swaging, or it can be very conveniently placed on theanvilX and operated on by the hammer or other tool for various purposes.The turning of the shaft Q permits of placing the saw with either faceon the anvil X.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a circularsaw holder, the combination of an adjustable frame, ashaft journaled in and projecting from said frame, and a sawarbor on theend of and at right angles to the said shaft, substantially asdescribed.

2. In a circular-saw holder, the combination ofapivoted main frame,alongitudinally and vertically adjustable frame carried by said mainframe, a shaft journaled in and projecting from the adjustable frame,and a saw-arbor on the end of and at right angles to the said shaft,substantially as herein shownand described.

3. In a circular-saw holder, the combination of a vertically andlongitudinally adjustable frame, a shaft for holding the saw to beoperated upon journaled in the said frame, a pivoted frame, agrinding-wheel journaled in the said pivoted frame, a cord attached tothe pivoted frame, and a spring connected to said cord and to a support,substantially as described.

4. In a circular-saw holder, the combination, with a supporting-frame,of a bar fitting on ways in the said frame and provided wlth a rack, ascrew for adjusting the bar, a sliding frame on said bar, a pinionengaging the rack on the bar,and means for locking the saidslidingframe, substantially as described.

5. In a circular-saw holder, the combination, with a vertically andlongitudinally adjustable frame and a main frame supporting the saidframe and mounted to turn vertically, of a shaft mounted to turn in thesaid adj ustable frame and carrying the circular saw to be operatedupon, and an anvil on which the said circular saw can be placed whileheld on the said shaft, substantially as shown and de scribed.

6. In a circular-saw holder, the combination, with an adjustable frameand a shaft for carrying the saw to be operated upon journaled in saidframe, of the vise W, consisting of the fixedjaw W, the hinged jaw W andthe hinged V-shaped, clip \V provided with the set-screw W",substantially as described.

7. In a circular saw holder, the combination, with a main frame mountedto turn, of guideways formed on the said frame, a post mounted to slideon the said guideways, screwrods mounted to turn on thesaid frame andscrewing in the said post, a frame held vertically adjustable on thesaid post, and a shaft IIO mounted to turn on the said frame andcarrycured on the said shaft, a rack secured to the ing the circular sawto be operated upon, subsaid post and into which the said gear-Wheelstantially as shown and described. meshes, and a1ongitudinally-extending shaft 8. In a circular-saw holder, the combina-I mounted to turn in thesaid frame and adapted 5 tion, with a main framemounted to turn and to carry the circular saw, substantially as 15provided with guideways, of a post held to shown and described. slidelongitudinally on the said guideways, a JOHN SLATER. frame held to slidevertically on the said post,a Witnesses: transverse shaft mounted in thesaid frame and HIRAM I. MILLER, 10 provided with a crank-arm, agear-Wheel se- DAVID R. 1VIATTERN.

